fixing a bug when virological data isnt returned
fixing a bug when virological data isnt returned

cmu-delphi/delphi-epidata,undefx/delphi-epidata,cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata,undefx/delphi-epidata,cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata